Around 3.0 is right. Whether or not to grade is a personal choice, although it does make the most sense for key issues. This is the first Rhino, and a book I'd love to own. When considering grading
Pros: protects comics (except from light), easy to display, maximizes return if/when you sell, makes valuing for insurance purposes easy
Cons: cost, can't be read, takes up more space
This specific book graded might sell around $300. Raw around $200. Probably costs around $50 to clean, press & grade, so maybe you "make" $50 (depending of course on how much you invested to acquire). Might take anywhere from 6 months to a year to get grading done. I'd be very much on the fence getting this graded if it were mine. If it was higher grade, no brainer to grade. Low grade, I'm not as sure.